Electric Energy Metering System Design Based On J2ee Architecture And Realization

In recent years, the development of electric energy metering system has laid a solid foundation for normal operation, fair competition, and accurate accounting of the electric market system. However, along with the further development of commercialization and market of the power grid, and at the same time the continual modifications made on the running modes and rules of the power market, more requirements have been raised for the energy metering system. For instance, the system is required to be more open and flexible, facilitating system expansions, modifications, and other software and device introductions.Nevertheless, the continuously expanded and hence complicated applications of the power grid have made the traditional 2-layer architecture become worse in maintainability, reusability, and expansibility. Therefore, the power grid has been tending to have a multi-layered distributed application system based on server and to support interoperation among different systems. Besides, the focus of its information technologies has been transferred from data management to business logic; and the data integration and reuse has become the key points of the distribute application system of the power grid.According to the development of the electric energy metering system, a technical scheme of a new-generation J2EE (Java 2 Enterprise Edition) -based electric energy metering system is introduced, adopting more advanced technologies and being capable of meeting higher demands of operation and market development of the electric grid.The new-generation electric energy metering system is composed of the digital power meters, the remote metering terminals, and the main station of automatic electric energy metering system. Through the remote metering terminals, the system continuously monitors the running status of the meters, and makes data analysis according to the logics configured at the main station. Afterwards, it sends the data of analysis to the main station through the network or the PSTN (Public Switched Telephone Network) . The main station provides the statistics, analysis and reports on itself or through the interfaces with other systems. This system can realize energy data acquisition, processing, computing, and accounting, and provide data support for energy data analysis, being very important for the management of power grid.This paper covers the following contents: 1. The designs of general architecture, hardware, and software of the new-generation electric energy metering system;2. The requirements and main functions of the main station;3. The database design and the main database table;4. The key technologies of the system, such as the data storage based on OOP(Object-Oriented Programming) , the application of new WEB technology,the data acquisition based on task assignment, and the technology ofcommunications among different security zones;5. The main contents of the IEC61970, and how to design the system based on the IEC61970 CIM (Common Information Model) /CIS (Common Interface Specification) .